a)
Interpretation:
How mass spectrometry is useful in distinguishing between 3-methyl-2-hexanone and 4-methyl-2-hexanone is to be stated.
Concept introduction:
In the mass spectrum of organic compounds, normally peaks due to Mc Lafferty rearrangement and α cleavage are generally visible. In Mc Lafferty rearrangement,
To state:
How to distinguish between 3-methyl-2-hexanone and 4-methyl-2-hexanone using mass spectrometry.
b)
Interpretation:
How mass spectrometry is useful in distinguishing between 3-heptanone and 4-heptanone is to be stated.
Concept introduction:
In the mass spectrum of organic compounds, normally peaks due to Mc Lafferty rearrangement and α cleavage are generally visible. In Mc Lafferty rearrangement, aldehydes and ketones that have hydrogens on the γ carbons transfer the hydrogen on the carbon to the carbonyl oxygen and the bond between the α and β carbons is broken to yield an alkene. The charge remains with the oxygen containing fragment. In the α cleavage, the bond between the carbonyl carbon and the α carbon breaks to yield a neutral radical and a resaonance stabilized acyl cation.
To state:
How to distinguish between 3-heptanone and 4-heptanone using mass spectrometry.
c)
Interpretation:
How mass spectrometry is useful in distinguishing between 2-methylpentanal and 3-methylpentanal is to be stated.
Concept introduction:
In the mass spectrum of organic compounds, normally peaks due to Mc Lafferty rearrangement and α cleavage are generally visible. In Mc Lafferty rearrangement, aldehydes and ketones that have hydrogens on the γ carbons transfer the hydrogen on the carbon to the carbonyl oxygen and the bond between the α and β carbons is broken to yield an alkene. The charge remains with the oxygen containing fragment. In the α cleavage, the bond between the carbonyl carbon and the α carbon breaks to yield a neutral radical and a resaonance stabilized acyl cation.
To show:
How to distinguish between 2-methylpentanal and 3-methylpentanal using mass spectrometry.
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Chapter 19 Solutions
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